... provided that the original work is properly attributed. Avian eggshells Life history Museum specimens Nest environment Permeability The striking diversity in shape, size and pigmentation of avian eggs ( Hauber, 2014 ) provides an ideal model system for studying the causes and consequences...

...D. A. Wharton; L. Petrone; A. Duncan; A. J. McQuillan SUMMARY The anhydrobiotic plant-parasitic nematode Ditylenchus dipsaci undergoes a decrease in permeability (the permeability slump) during the early stages of desiccation and this produces the slow rate of water loss necessary for its survival...

... status,Na + ,K + -ATPase activity and occludin protein expression in the gills, intestine and kidney. Occludin expression altered in response to hydromineral imbalance in a tissue-specific manner suggesting a dynamic role for this TJ protein in the regulation of epithelial permeability in fishes...

... have been studied extensively in the contexts of disease and cosmetics,relatively little is known about the processes of permeability barrier ontogenesis related to adaptation and environment. Advances in such knowledge have didactic significance for understanding vertebrate evolution as well...

... detoxification' capability because of its unique behavior of burrow building in the mudflats and living therein in a limited volume of water. In addition, the skin of P. schlosseri had low permeability to NH 3 . Using an Ussing-type apparatus with 10 mmol l -1 NH 4 Cl and a 1 unit pH gradient (pH 8.0 to 7.0...

... value of -27.4°C; however, glycerol concentration and supercooling point did not change for the subnivean species. The permeability of the cuticle of all species was extremely low (0.33-1.00μg h -1 cm -2 mmHg -1 at 5°C and 0 %relative humidity; 1 mmHg=0.133 kPa), even compared with that of desert...

... the ability of urea to enter their body in the first place. The mechanism responsible for this reduction in uptake is uncertain. *Author for correspondence (e-mail: [email protected] ) 24 5 2001 © The Company of Biologists Limited 2001 2001 permeability stress resistance...

... on permeability were quantified. Arrhenius plots of permeability were biphasic, and transition temperatures for water loss ( T c ) were similar to T m . In grasshoppers Melanoplus sanguinipes , changes in cuticular water loss were measured using flow-through respirometry. Transition temperatures were determined...

.... 16 05 1995 © The Company of Biologists Limited 1995 stretch-activated channel permeability selectivity mollusc mechanosensitive channel snail Lymnaea stagnalis In many neurons, resting K + conductance is modulated by neurotransmitters via second messengers...

...J. J. B. Smith; J. Machin; G. J. Lampert ABSTRACT Measurements of electrical resistance appear to be useful indicators of porosity and related water permeability in insect cuticle. To develop an adequate understanding of how such measurements relate to the physical and structural properties...

... with reabsorptive processes in the rectum. 24 1 1991 © 1991 by Company of Biologists 1991 calcium accumulation Rhodnius prolixus, Malpighian tubules concretion bodies deposit excretion permeability epithelia Young (non-adult) stages of Rhodnius prolixus take very large meals...

...Peter Tytler; Michael V. Bell ABSTRACT The fluxes of 3 H 2 O, 22 Na and 36 Cl were simultaneously measured in yolk-sac larvae of cod (Gadus morhua L.) in 34 %o sea water at 4·5 °C. The rates of turnover of all three isotopes were higher than in adult fish. Diffusional permeability coefficients...

... in a manner similar to Ca 2+ . * Present address: Dorset Research Centre, P.O. Box 39, Dorset, Ontario, Canada P0A 1E0. 17 11 1988 © 1989 by Company of Biologists 1989 metal gills uptake permeability Water can be an important source of Zn to rainbow trout. Below...

..., College of Education, University of Baghdad, Iraq. 27 05 1987 © 1987 by Company of Biologists 1987 Periplaneta cuticle desiccation water loss permeability hormonal control decapitation The major avenues for water loss from the cockroach are the excretory system...

...J. Machin; G. J. Lampert; M. J. O’Donnell ABSTRACT Improved in vivo and in vitro techniques for measuring cuticular water permeability are described. Air flowing over a cuticle disc mounted in a holder, permitted elimination of unstirred layers, or corrections for them, for the first time...

...J. Machin; G. J. Lampert ABSTRACT Two layers in Periplaneta pronotum, endocuticle and combined epicuticle and exocuticle were functionally distinguished by their permeabilities and water affinities. A passive model combining the permeabilities of these layers and the water content...

...Stephen R. L. Bolt ABSTRACT Recent investigations indicate that some species of Crustacea have the ability to alter their apparent permeability to water in order to reduce the osmotic stress placed on the animal ( Smith, 1967 , 1970 , 1976 ; Bolt, 1982 ; Lockwood, Bolt & Dawson, 1982...

... and cycling salinity changes. The apparent permeability to water of these three species was investigated in various salinity regimes using THO as a marker. Of the three species, only G. duebeni demonstrated large and significant changes in apparent permeability to water. The bulk flow into and out...

...M. J. O’Donnell; S. H. P. Maddrell ABSTRACT Because the frontal area of the intercellular clefts in Malpighian tubules is small, and the osmotic permeability of the cell membranes is large, the route for transepithelial water movement during fluid secretion is transcellular. Water movements appear...